Air conditioning and water heating all-in-one machine and control method therefor, and computer program product

Abstract

A control method for an air conditioning and water heating all-in-one machine, comprising: enabling only the water heating mode of an air conditioning and water heating all-in-one machine; obtaining an outdoor environment temperature and the water temperature in a water tank, and controlling the operation frequency of a compressor on the basis of the outdoor environment temperature and the water temperature; and / or, in a starting preset time, obtaining the operation frequency of the compressor, and controlling the opening degree of a water tank electronic expansion valve on the basis of the operation frequency; and / or after the starting preset time, acquiring the actual exhaust temperature and the target exhaust temperature of the compressor, and controlling the opening degree of the water tank electronic expansion valve on the basis of the actual exhaust temperature and the target exhaust temperature. When only the water heating mode is operated, the operation frequency of the compressor and / or the water tank electronic expansion valve can be effectively controlled, thereby achieving the purpose of improving the use experience of a user. Also provided are an air conditioning and water heating all-in-one machine and a computer program product.

Description

An integrated air conditioning and hot water unit and its control method and computer program product

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410675850.5, filed on May 28, 2024, entitled "An Integrated Air Conditioner and Water Heater and Its Control Method and Computer Program Product", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air handling technology, and in particular to an integrated air conditioning and hot water unit, a control method for the integrated air conditioning and hot water unit, and a computer program product. Background Technology

[0004] Currently, integrated air conditioning and hot water systems consist of an indoor unit, an outdoor unit, and a hot water module. There may be one or more indoor units, each including an indoor heat exchanger and an indoor electronic expansion valve. The outdoor unit includes a compressor and an outdoor heat exchanger. The hot water module includes a water tank and a water tank heat exchanger, with the heat exchanger located inside the water tank.

[0005] When the air conditioner and water heater are running in single hot water mode, the working process is as follows: after the high temperature and high pressure refrigerant is discharged from the compressor, it flows through the water tank solenoid valve into the water tank heat exchanger, where it releases heat to the water tank. After being throttled by the water tank electronic expansion valve, it becomes a low temperature and low pressure refrigerant, which flows into the air conditioner outdoor unit heat exchanger. The refrigerant evaporates and absorbs heat in the heat exchanger and then enters the compressor suction end, completing the entire cycle.

[0006] Because the water tank heat exchanger lacks coil temperature sensors and inlet / outlet temperature sensors, the following problems arise when operating in single hot water mode: First, there's the issue of controlling the air conditioner's operating frequency. Traditional air conditioners use the difference between the heat exchanger coil temperature and the target temperature to control the compressor's target frequency. However, since the water tank heat exchanger lacks coil temperature sensors, an alternative control method is needed. Second, there's the issue of controlling the opening of the water tank's electronic expansion valve. Traditional air conditioners use the indoor unit's heat exchanger coil temperature and the outlet superheat value to control the target opening of the indoor electronic expansion valve. However, since the water tank heat exchanger lacks coil temperature and outlet temperature sensors, an alternative control method is also required.

[0007] In other words, there is an urgent need for a control method for integrated air conditioning and hot water units operating in single hot water mode, in order to effectively control the compressor operating frequency and / or the electronic expansion valve of the water tank, thereby achieving better hot water production. Summary of the Invention

[0008] In view of the above problems, this application is made to provide an integrated air conditioning and hot water unit, a control method for the integrated air conditioning and hot water unit, and a computer program product that overcomes or at least partially solves the above problems. When operating in single hot water mode, it can effectively control the compressor operating frequency and / or the electronic expansion valve of the water tank to improve the user experience.

[0009] Specifically, this application provides the following technical solution:

[0010] A control method for an integrated air conditioning and hot water unit includes:

[0011] The air conditioning and water heater unit is activated in single hot water mode.

[0012] The system acquires the outdoor ambient temperature and the water temperature in the water tank, and controls the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature; and / or

[0013] Within a preset startup time, the compressor's operating frequency is acquired, and the opening degree of the water tank's electronic expansion valve is controlled based on the operating frequency; and / or

[0014] After a preset start-up time, the actual exhaust temperature and target exhaust temperature of the compressor are obtained, and the opening degree of the electronic expansion valve of the water tank is controlled according to the actual exhaust temperature and the target exhaust temperature.

[0015] Optionally, controlling the opening degree of the electronic expansion valve of the water tank according to the operating frequency includes:

[0016] The first opening degree of the electronic expansion valve of the water tank is obtained based on the operating frequency;

[0017] Control the electronic expansion valve of the water tank to perform the first opening degree.

[0018] Optionally, controlling the opening degree of the electronic expansion valve of the water tank based on the actual exhaust temperature and the target exhaust temperature includes:

[0019] The second opening degree of the water tank electronic expansion valve is obtained based on the actual exhaust temperature and the target exhaust temperature.

[0020] Control the electronic expansion valve of the water tank to perform a second opening.

[0021] Optionally, the air conditioning and hot water unit has a pre-stored mapping table of outdoor ambient temperature, water temperature, and optimal compressor frequency value;

[0022] Controlling the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature includes:

[0023] The optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature is determined based on the mapping table.

[0024] Control the compressor to execute the corresponding optimal frequency value.

[0025] Optionally, obtaining the first opening degree of the electronic expansion valve of the water tank based on the operating frequency includes:

[0026] The first aperture is calculated using the following formula: YS = ap * Hz + bp

[0027] Where Hz is the operating frequency of the compressor;

[0028] ap is a set coefficient;

[0029] bp is a set value;

[0030] YS represents the first opening degree of the electronic expansion valve in the water tank.

[0031] Optionally, obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature includes:

[0032] The valve opening compensation value of the water tank electronic expansion valve is obtained based on the difference between the target exhaust temperature and the actual exhaust temperature.

[0033] The second opening is obtained based on the valve opening compensation value and the first opening.

[0034] Optionally, obtaining the target discharge temperature of the compressor includes:

[0035] The target exhaust temperature is calculated using the following formula: DisT=a*Hz+b+c

[0036] Where DisT is the target exhaust temperature;

[0037] Hz is the operating frequency of the compressor;

[0038] 'a' is a preset coefficient;

[0039] b is the first preset value;

[0040] c is the second preset value.

[0041] Optionally, the second preset value is obtained by dividing the water temperature in the water tank into segments.

[0042] Optionally, obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature includes:

[0043] The second opening degree is calculated using the following formula: YT = f(Dis, DisT)

[0044] Where YT represents the second opening degree;

[0045] Dis is the actual exhaust temperature;

[0046] DisT is the target exhaust temperature;

[0047] The function f is a function that is analytically determined by the PID control method.

[0048] Optionally, the control method further includes:

[0049] The steps of obtaining the outdoor ambient temperature and the water temperature in the water tank are performed once every preset time interval.

[0050] Optionally, the water temperature inside the tank is obtained, including:

[0051] Obtain the water temperature at the center of the tank and the outlet water temperature;

[0052] The average of the middle water temperature and the outlet water temperature is taken as the water temperature inside the water tank.

[0053] On the other hand, this application also provides an integrated air conditioning and hot water unit. The integrated air conditioning and hot water unit further includes a controller, which includes a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the steps of the control method for the integrated air conditioning and hot water unit described above.

[0054] Furthermore, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of the aforementioned control method for an integrated air conditioning and hot water unit.

[0055] This application discloses an integrated air conditioning and hot water unit, its control method, and a computer program product, specifically providing a single hot water control method for the integrated air conditioning and hot water unit. When the integrated air conditioning and hot water unit operates in single hot water mode, the compressor's operating frequency is controlled based on the outdoor ambient temperature and the water temperature in the tank; and / or, in the initial startup phase, the opening degree of the electronic expansion valve in the water tank is controlled based on the compressor's operating frequency; and / or, in the stable operation phase, the opening degree of the electronic expansion valve in the water tank is controlled based on the actual exhaust temperature and the target exhaust temperature. Compared with related technologies, this invention can rationally, scientifically, and precisely adjust the compressor frequency and / or the opening degree of the electronic expansion valve in the water tank, thereby enabling the integrated air conditioning and hot water unit to achieve better hot water production.

[0056] Furthermore, the control method of this application has the beneficial effect of simple and easy-to-execute control procedures.

[0057] Therefore, those skilled in the art will more readily understand the above and other objects, advantages and features of the present invention from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0058] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0059] Figure 1 is a schematic flowchart of a control method for an integrated air conditioning and hot water unit according to an embodiment of the present invention;

[0060] Figure 2 is a schematic flowchart of a control method according to an embodiment of the present invention;

[0061] Figure 3 is a schematic flowchart of a control method according to an embodiment of the present invention;

[0062] Figure 4 is a schematic flowchart of a control method according to an embodiment of the present invention;

[0063] Figure 5 is a schematic flowchart of a control method according to an embodiment of the present invention;

[0064] Figure 6 is a schematic flowchart of a control method according to an embodiment of the present invention;

[0065] Figure 7 is a schematic diagram of the working principle of an air conditioning and hot water integrated unit according to an embodiment of the present invention;

[0066] Figure 8 is a schematic block diagram of an air conditioning and hot water integrated unit according to an embodiment of the present invention;

[0067] Figure 9 is a schematic block diagram of a computer program product according to an embodiment of the present invention. Detailed Implementation

[0068] The following description, with reference to Figures 1 to 9, outlines an embodiment of the present invention of an integrated air conditioning and hot water unit, its control method, and a computer program product. The terms "front," "rear," "upper," "lower," "top," "bottom," "inner," "outer," and "lateral," etc., indicate the orientation or positional relationship based on the positions or positional relationships shown in the figures. They are used solely for the purpose of facilitating and simplifying the description of the present invention, and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0069] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0070] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Any reference to prior art in the specification is not and should not be construed as an admission or in any way an implication that such prior art constitutes part of the general common knowledge in the application region or any other jurisdiction, or that such prior art could be reasonably understood and regarded as relevant by a person skilled in the art.

[0074] Figure 1 is a schematic flowchart of a control method for an integrated air conditioning and hot water unit 100 according to an embodiment of the present invention. In conjunction with Figures 2-7, the present invention provides a control method for an integrated air conditioning and hot water unit 100.

[0075] As shown in Figure 1, a control method for an integrated air conditioning and hot water unit may include the following steps:

[0076] S100, the air conditioning and water heater can be activated in single hot water mode;

[0077] S200 acquires the outdoor ambient temperature and the water temperature in the water tank, and controls the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature.

[0078] S300 acquires the compressor's operating frequency within a preset startup time and controls the opening of the water tank's electronic expansion valve based on the operating frequency.

[0079] The S400, after a preset start-up time, acquires the actual and target exhaust temperatures of the compressor and controls the opening of the electronic expansion valve of the water tank based on these temperatures.

[0080] Specifically, the preset time can be set as needed. For example, the preset time can be 6 minutes.

[0081] In this embodiment, since the water tank heat exchanger is located inside the water tank, the water temperature has a significant impact on it. Therefore, this embodiment controls the compressor's operating frequency based on the water temperature inside the tank. Furthermore, since maintaining the temperature difference between the water tank heat exchanger and the water temperature inside the tank is crucial for heating the water tank, a higher temperature difference results in a higher heating rate. According to the system diagram, the compressor exhaust is directly injected into the water tank heat exchanger; therefore, the water tank heat exchanger temperature is directly determined by the exhaust temperature. Given that the compressor frequency is determined by the water temperature inside the tank, to ensure the heat exchange temperature difference, the valve opening can be increased or decreased based on the exhaust temperature to further adjust the exhaust temperature and ensure it meets the water heating requirements. Therefore, after a preset start-up time, the opening of the water tank electronic expansion valve is controlled based on the target exhaust temperature and the actual exhaust temperature. Additionally, during the preset start-up time, because the temperature difference between the water tank heat exchanger and the water temperature inside the tank is relatively large, the opening of the water tank electronic expansion valve is controlled based on the actual operating frequency of the compressor.

[0082] This embodiment provides a single-hot water control method for an integrated air conditioning and hot water unit. When the integrated air conditioning and hot water unit operates in single-hot water mode, the compressor's operating frequency is controlled based on the outdoor ambient temperature and the water temperature in the tank. During the initial startup phase, the opening degree of the electronic expansion valve in the water tank is controlled based on the compressor's operating frequency. During stable operation, the opening degree of the electronic expansion valve in the water tank is controlled based on the actual exhaust temperature and the target exhaust temperature. Compared with related technologies, this invention can rationally, scientifically, and precisely adjust the compressor frequency and the opening degree of the electronic expansion valve in the water tank, thereby enabling the integrated air conditioning and hot water unit to achieve better hot water production.

[0083] In some alternative embodiments of the present invention, a control method for an integrated air conditioning and hot water unit may include step S100, and may also include any one or two of steps S200, S300 and S400.

[0084] As shown in Figure 2, in some optional embodiments of the present invention, step S300, which involves controlling the opening degree of the electronic expansion valve of the water tank according to the operating frequency, specifically includes the following steps:

[0085] S301, the first opening degree of the electronic expansion valve of the water tank is obtained according to the operating frequency;

[0086] S302 controls the electronic expansion valve of the water tank to perform the first opening degree.

[0087] During the preset start-up time, the temperature difference between the water tank heat exchanger and the water temperature inside the tank is significant, meaning the exhaust temperature is much higher than the water temperature inside the tank. Meanwhile, the compressor is in its frequency ramp-up phase, resulting in large frequency fluctuations, gradually increasing system pressure and refrigerant flow. At this point, refrigerant flow is a key factor affecting the heating performance of the water tank heat exchanger. Therefore, when the compressor first starts running, controlling the water tank's electronic expansion valve to its initial opening degree based on the compressor's actual operating frequency not only promptly adjusts the refrigerant flow through the water tank heat exchanger, ensuring good heat exchange capacity, but also effectively balances the system pressure.

[0088] As shown in Figure 3, in some optional embodiments of the present invention, step S400, which involves controlling the opening of the electronic expansion valve of the water tank based on the actual exhaust temperature and the target exhaust temperature, specifically includes the following steps:

[0089] S401, the second opening degree of the water tank electronic expansion valve is obtained based on the actual exhaust temperature and the target exhaust temperature;

[0090] S402 controls the electronic expansion valve of the water tank to perform the second opening degree.

[0091] After the preset start-up time, the water tank heating phase begins. The compressor is in a relatively stable phase with minimal frequency fluctuations; the water temperature in the tank is relatively high. At this time, the exhaust temperature is a key factor affecting the heat exchange capacity of the water tank heat exchanger. A sufficiently high exhaust temperature needs to be maintained to keep the refrigerant temperature in the heat exchanger, thus ensuring the heating effect of the water tank. Therefore, in this embodiment, after the preset start-up time, based on the actual exhaust temperature and the target exhaust temperature, the electronic expansion valve of the water tank is controlled to execute a corresponding second opening degree to adjust the actual exhaust temperature, making it equal to or close to the target exhaust temperature. This maintains a certain difference between the indoor heat exchanger temperature and the water temperature, thereby ensuring the water tank heat exchanger has good heat exchange capacity to meet the heating requirements of the water tank.

[0092] In some optional embodiments of the present invention, the integrated air conditioning and water heater has a pre-stored mapping table of outdoor ambient temperature, water temperature, and optimal compressor frequency. The mapping table may be as shown in Table 1.

[0093] As shown in Figure 4, step S200, which involves controlling the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature, specifically includes the following steps:

[0094] S201, Based on the mapping table of outdoor ambient temperature, water temperature and compressor optimal frequency value, determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature;

[0095] S202 controls the compressor to operate at the corresponding optimal frequency value. In other words, the optimal frequency value is used as the compressor's operating frequency.

[0096] Table 1. Mapping Relationship between Outdoor Ambient Temperature, Water Temperature, and Optimal Compressor Frequency Value

[0097] Further, step S201 includes: determining the range of the current outdoor ambient temperature in the mapping table, and determining the range of the current water temperature in the mapping table; then finding the optimal frequency value of the corresponding compressor in the mapping table.

[0098] Using this embodiment, the optimal frequency value of the compressor under different outdoor ambient temperature and water temperature conditions can be obtained quickly and accurately, which is conducive to more precise control of the opening of the electronic expansion valve, and thus further improves the hot water production effect of the air conditioning and hot water integrated unit.

[0099] In other optional embodiments of the present invention, the optimal frequency value of the compressor under different outdoor ambient temperature and water temperature conditions can be obtained based on the outdoor ambient temperature and water temperature, combined with the corresponding algorithm.

[0100] In some optional embodiments of the present invention, step S301, which involves controlling the electronic expansion valve of the water tank to perform the first opening degree according to the operating frequency, may include the following steps:

[0101] The first aperture is calculated using the following formula: YS = ap * Hz + bp

[0102] Where Hz is the operating frequency of the compressor; ap is the set coefficient; bp is the set value; and YS is the first opening degree of the electronic expansion valve of the water tank.

[0103] Furthermore, Hz represents the actual operating frequency of the compressor, measured in Hertz. YS is measured in Plus. ap and bp are values ​​derived from measured data. The first opening degree is also known as the initial valve opening degree.

[0104] Using the calculation formula in this embodiment, the first opening degree can be obtained quickly and accurately, thereby improving the accuracy of water temperature control and further enhancing the hot water production effect of the air conditioning and hot water integrated unit.

[0105] As shown in Figure 5, in some optional embodiments of the present invention, S401, obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature may include the following steps:

[0106] S4011, based on the difference between the target exhaust temperature and the actual exhaust temperature, the valve opening compensation value of the water tank electronic expansion valve is obtained;

[0107] S4012, based on the valve opening compensation value and the first opening, the second opening is obtained.

[0108] This embodiment compensates for the valve opening based on the difference between the target exhaust temperature and the actual exhaust temperature. The valve opening can be adjusted in a timely manner according to the actual heat exchange requirements, thereby improving the accuracy of water temperature control.

[0109] In some optional embodiments of the present invention, obtaining the target discharge temperature of the compressor includes:

[0110] The target exhaust temperature is calculated using the following formula: DisT=a*Hz+b+c

[0111] Where DisT is the target exhaust temperature, and its unit is °C; Hz is the compressor operating frequency, and its unit is Hertz; a is the preset coefficient; b is the first preset value; and c is the second preset value.

[0112] Furthermore, Hz represents the actual operating frequency of the compressor. a and b are values ​​derived from measured data, and a and b are fixed values. Even further, the second preset value is determined by dividing the water temperature in the tank into segments, and the specific values ​​of c are shown in Table 2 below. In other words, the preset water temperature range of the current water temperature is determined, and the c value corresponding to that preset water temperature range is used as the second preset value.

[0113] Table 2

[0114] This embodiment provides a specific algorithm for calculating the target exhaust temperature. In the algorithm, the second preset value is determined based on the water temperature in the tank, which improves the accuracy of the target exhaust temperature calculation. Therefore, the target exhaust temperature can be calculated quickly and accurately using the above formula.

[0115] In some optional embodiments of the present invention, S401, obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature includes:

[0116] The second opening degree is calculated using the following formula: YT = f(Dis, DisT)

[0117] Where YT represents the second opening degree, Dis represents the actual exhaust temperature, and DisT represents the target exhaust temperature. This formula indicates that the second valve opening degree is a function of the actual exhaust temperature and the target exhaust temperature. This function is first analyzed using a PID control method, then the actual parameters are measured, and the precise control logic is obtained by correcting the measured actual parameters. This embodiment provides a specific algorithm for calculating the second opening degree based on the actual exhaust temperature and the target exhaust temperature. Using the above algorithm, the second opening degree can be calculated quickly and accurately, thereby enabling precise control of the water tank electronic expansion valve during stable operation.

[0118] In some optional embodiments of the present invention, the control method further includes: performing the step of obtaining the outdoor ambient temperature and the water temperature in the water tank once every preset time interval.

[0119] Using the above method, the operating frequency of the compressor and the opening degree of the electronic expansion valve can be adaptively adjusted according to the changes in outdoor ambient temperature and water temperature in the water tank, thereby enabling more precise control of the heating effect of the water tank heat exchanger.

[0120] As shown in Figure 6, in some optional embodiments of the present invention, "obtaining the water temperature in the water tank" specifically includes the following steps:

[0121] S501, obtain the water temperature in the middle of the water tank and the water temperature at the outlet;

[0122] S502 uses the average of the middle water temperature and the outlet water temperature as the water temperature inside the tank.

[0123] Specifically, a first temperature sensor is installed in the middle of the water tank to obtain the temperature inside the tank; a second temperature sensor is installed at the outlet of the water tank to obtain the outlet temperature. Since there may be errors between the middle and outlet water temperatures, in this embodiment, the average of the middle and outlet water temperatures is used as the water temperature inside the tank. This reduces misjudgments and further improves control accuracy.

[0124] As shown in Figure 7, in some optional embodiments of the present invention, the integrated air conditioning and hot water unit includes multiple indoor units connected in parallel. The integrated air conditioning and hot water unit is a multi-split air conditioning and hot water unit, with multiple indoor units distributed across multiple indoor spaces to exchange heat for these spaces.

[0125] For example, an integrated air conditioning and hot water unit includes a compressor 121, a four-way valve 122, an outdoor heat exchanger 123, three indoor units, and a hot water module 127.

[0126] The three indoor units are designated as Indoor Unit A, Indoor Unit B, and Indoor Unit C. Each indoor unit includes an indoor electronic expansion valve and an indoor unit, and each indoor unit includes an indoor heat exchanger. Indoor Unit A includes a first indoor electronic expansion valve 135A and indoor unit A 124, with indoor unit A 124 including a first indoor heat exchanger 1241. Indoor Unit B includes a second indoor electronic expansion valve 135B and indoor unit B (not shown in the figure), with indoor unit B including a second indoor heat exchanger. Indoor Unit C includes a third indoor electronic expansion valve 135C and indoor unit C (not shown in the figure), with indoor unit C including a third indoor heat exchanger. The hot water module 127 includes a water tank and a water tank heat exchanger, with the water tank heat exchanger located inside the water tank. The compressor 121's exhaust port connects to a first exhaust branch and a second exhaust branch. The first exhaust branch connects to the water tank heat exchanger, and the second exhaust branch connects to the high-temperature inlet of the four-way valve 122. A first solenoid valve 132 and a first shut-off valve 133 are provided on the first exhaust branch. The first solenoid valve 132 is used to regulate the refrigerant flow rate of the water tank heat exchanger, and the first shut-off valve 133 is used to control the opening and closing of the first exhaust branch. A water tank electronic expansion valve 137 is provided on the outlet side of the water tank heat exchanger to throttle the refrigerant flowing out of the water tank heat exchanger. An outdoor refrigerant regulating device, which is an outdoor electronic expansion valve 131, is provided between the outdoor heat exchanger 123 and the four-way valve 122 to regulate the amount of refrigerant flowing through the outdoor heat exchanger 123. The outdoor heat exchanger 123 and the water tank electronic expansion valve 137 are connected to the indoor unit through a liquid refrigerant manifold 151. The liquid refrigerant manifold 151 is connected to three liquid pipe connection branches: a first liquid pipe connection branch, which is configured to connect to indoor unit A; a second liquid pipe connection branch, which is configured to connect to indoor unit B; and a third liquid pipe connection branch, which is configured to connect to indoor unit C. A third shut-off valve 134 is provided between the outdoor heat exchanger 123 and the liquid refrigerant manifold 151.

[0127] The indoor heat exchanger connection port of the four-way valve 122 is connected to the gaseous refrigerant manifold 152 via a refrigerant pipe, and a second shut-off valve 136 and a second solenoid valve 138 are provided on the refrigerant pipe. The gaseous refrigerant manifold 152 has three gas pipe connection branches: a first gas pipe connection branch configured to connect to indoor unit A; a second gas pipe connection branch configured to connect to indoor unit B; and a third gas pipe connection branch configured to connect to indoor unit C.

[0128] When the air conditioner-water heater is operating in single hot water mode, the first solenoid valve 132, the first shut-off valve 133, the third shut-off valve 134, the outdoor electronic expansion valve 131, and the water tank electronic expansion valve 137 are opened; the second shut-off valve 136, the second solenoid valve 138, the first indoor electronic expansion valve 135A, the second indoor electronic expansion valve 135B, and the third indoor electronic expansion valve 135C are closed.

[0129] When the air conditioner and water heater is running in single hot water mode, the working principle of the air conditioner and water heater is as follows: the high temperature and high pressure refrigerant discharged by the compressor enters the water tank heat exchanger, and then passes through the water tank electronic expansion valve 137, outdoor heat exchanger 123, outdoor electronic expansion valve 131 and four-way valve 122 in sequence, and finally passes through the compressor intake port and returns to the compressor 121.

[0130] The air conditioning and water heater also includes an outdoor temperature sensor 140, which is used to obtain the outdoor ambient temperature.

[0131] In some alternative embodiments of the present invention, the integrated air conditioning and hot water unit includes an indoor unit. In this embodiment, the integrated air conditioning and hot water unit has the advantages of being easy to manufacture and having low production costs.

[0132] In some preferred embodiments of the present invention, a control method for an integrated air conditioning and hot water unit may include the following steps:

[0133] S1 controls the integrated air conditioning and hot water unit to start single hot water mode;

[0134] S2, every preset time interval, obtains the outdoor ambient temperature and the water temperature in the water tank;

[0135] S3. Based on the mapping table of outdoor ambient temperature, water temperature and compressor optimal frequency value, determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature.

[0136] S4 controls the compressor to execute the corresponding optimal frequency value;

[0137] S5, within the preset startup time, obtain the compressor's operating frequency;

[0138] S6 controls the opening degree of the electronic expansion valve of the water tank according to the operating frequency;

[0139] S7, after a preset startup time, obtains the actual discharge temperature and target discharge temperature of the compressor;

[0140] S8 controls the opening of the electronic expansion valve of the water tank based on the actual exhaust temperature and the target exhaust temperature.

[0141] This embodiment provides a single-hot water control method for an integrated air conditioning and hot water unit. When the integrated air conditioning and hot water unit operates in single-hot water mode, the outdoor ambient temperature and water temperature are acquired in real time. Based on a mapping table of outdoor ambient temperature, water temperature, and the optimal frequency value of the compressor, the optimal frequency value of the compressor is obtained, and the compressor is controlled to execute at the aforementioned optimal frequency value. In the initial startup phase, the opening degree of the electronic expansion valve of the water tank is controlled according to the compressor's operating frequency; in the stable operation phase, the opening degree of the electronic expansion valve of the water tank is controlled according to the actual exhaust temperature and the target exhaust temperature. Compared with related technologies, this embodiment can perform reasonable, scientific, and precise adaptive adjustment of the compressor frequency and the opening degree of the electronic expansion valve of the water tank, thereby enabling the integrated air conditioning and hot water unit to have a better hot water production effect.

[0142] As shown in Figure 8, this embodiment of the invention also provides an integrated air conditioner and water heater 100. The integrated air conditioner and water heater 100 further includes a controller 110. The controller 110 includes a memory 111, a processor 112, and a computer program 210 stored in the memory 111 and running on the processor 112. When the processor 112 executes the computer program 210, it implements the steps of the control method of the integrated air conditioner and water heater 100 of any of the above embodiments or combinations of embodiments.

[0143] The controller 110 can be directly installed inside the air conditioning and water heater 100, connected via wired connection to the relevant electrical components of the air conditioning and water heater 100, and implement the steps of the control method for the air conditioning and water heater 100. Alternatively, the controller can be installed on a cloud server, connected via wired or wireless connection to the relevant electrical components of the air conditioning and water heater 100, and implement the steps of the control method for the air conditioning and water heater 100.

[0144] In some embodiments of the computer program product of the present invention, as shown in FIG9, the computer program product 200 includes a computer program 210, which, when executed by the processor 112, implements the steps of the control method of the air conditioning and hot water integrated unit 100 described above.

[0145] The computer program 210 used to perform the operations of this invention can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, integrated circuit configuration data, or source code or object code written in any combination of one or more programming languages ​​and procedural programming languages. The computer program 210 can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can connect to the user's computer via any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or it can connect to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, to perform aspects of the invention, electronic circuits including, for example, programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs) can execute computer-readable program instructions to personalize the electronic circuits by utilizing state information of computer-readable program instructions.

[0146] For the purposes of this embodiment, computer program product 200 is a related product that includes computer program 210.

[0147] Computer program 210 may be stored in a computer-readable storage medium.

[0148] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0149] For the purposes of this embodiment, a computer-readable storage medium can be any means capable of containing, storing, communicating, propagating, or transmitting a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection (electronic device) having one or more wires, a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, a computer-readable storage medium can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0150] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be performed in any particular order, or that all operations of the method are included in every case. Furthermore, the method may include additional operations. Within the scope of the technical concept provided by the method in this embodiment, additional variations can be made to the above method.

[0151] While this invention provides several exemplary embodiments, many other variations or modifications consistent with the principles of this invention can be directly determined or derived from the disclosure of this invention without departing from its spirit and scope. Therefore, the scope of this invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A control method for an integrated air conditioning and hot water unit, comprising: The air conditioning and water heater unit is activated in single hot water mode. The system acquires the outdoor ambient temperature and the water temperature in the water tank, and controls the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature; and / or Within a preset startup time, the operating frequency of the compressor is obtained, and the opening degree of the electronic expansion valve of the water tank is controlled according to the operating frequency. and / or After a preset start-up time, the actual exhaust temperature and target exhaust temperature of the compressor are obtained, and the opening degree of the electronic expansion valve of the water tank is controlled according to the actual exhaust temperature and the target exhaust temperature.

2. The control method according to claim 1, wherein, The method of controlling the opening degree of the electronic expansion valve of the water tank according to the operating frequency includes: The first opening degree of the electronic expansion valve of the water tank is obtained based on the operating frequency; Control the electronic expansion valve of the water tank to perform the first opening degree.

3. The control method according to claim 1, wherein, The method of controlling the opening degree of the electronic expansion valve of the water tank based on the actual exhaust temperature and the target exhaust temperature includes: The second opening degree of the water tank electronic expansion valve is obtained based on the actual exhaust temperature and the target exhaust temperature. Control the electronic expansion valve of the water tank to perform a second opening.

4. The control method according to claim 1, wherein, The air conditioning and hot water unit has a pre-stored mapping table of outdoor ambient temperature, water temperature and the optimal frequency value of the compressor. Controlling the operating frequency of the compressor based on the outdoor ambient temperature and the water temperature includes: Based on the mapping table, determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature; Control the compressor to execute the corresponding optimal frequency value.

5. The control method according to claim 2, wherein, The method of obtaining the first opening degree of the electronic expansion valve of the water tank based on the operating frequency includes: The first opening degree is calculated using the following formula: YS = ap * Hz + bp Where Hz is the operating frequency of the compressor; ap is a set coefficient; bp is a set value; YS represents the first opening degree of the electronic expansion valve in the water tank.

6. The control method according to claim 3, wherein, The method of obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature includes: The valve opening compensation value of the water tank electronic expansion valve is obtained based on the difference between the target exhaust temperature and the actual exhaust temperature. The second opening is obtained based on the valve opening compensation value and the first opening.

7. The control method according to claim 1, wherein, The process of obtaining the target discharge temperature of the compressor includes: The target exhaust temperature is calculated using the following formula: DisT = a * Hz + b + c Where DisT is the target exhaust temperature; Hz is the operating frequency of the compressor; 'a' is a preset coefficient; b is the first preset value; c is the second preset value.

8. The control method according to claim 3, wherein, The method of obtaining the second opening degree of the water tank electronic expansion valve based on the actual exhaust temperature and the target exhaust temperature includes: The second opening degree is calculated using the following formula: YT = f(Dis, DisT) Where YT represents the second opening degree; Dis is the actual exhaust temperature; DisT is the target exhaust temperature; The function f is a function that is analytically determined by the PID control method.

9. The control method according to claim 1, further comprising: The steps of obtaining the outdoor ambient temperature and the water temperature in the water tank are performed once every preset time interval.

10. The control method according to claim 1, wherein, To obtain the water temperature in the tank, including: Obtain the water temperature at the center of the tank and the outlet water temperature; The average of the middle water temperature and the outlet water temperature is taken as the water temperature inside the water tank.

11. An integrated air conditioning and hot water unit, comprising a controller, the controller including a memory, a processor and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, it implements the steps of the control method for the integrated air conditioning and hot water unit as described in any one of claims 1 to 10.

12. A computer program product comprising a computer program, wherein, When the computer program is executed by the processor, it implements the steps of the control method for the integrated air conditioning and hot water unit as described in any one of claims 1 to 10.

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